I had a marble slab about 2-3in thick and 24x24in fly off a truck and hit my Denali's windshield while I was driving around 100mph on the highway. Luckily it did not damage the windshield but at the force it hit, it freaked me out. I am glad that I was able to keep control after it hit.

__________________
2011 ///X5 M (On Order)

2009 X5 4.8 M Sport Space Gray/Black Fully Loaded

2007 GMC Yukon XL Denali Loaded and Customised